Problemsby IbisTrouble with pandas dataframe
Data engineering7 posts from 6 people6d active+33 posts in the last 7 days, 2 the 7 days before (steady)
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7, newest firstHow to reduce dataframe with nan values maintaining consecutive values in columns...and the original columns. For example, -0.06 belonged to A, and 0.12 belonged to B.. How can I do this?. Setup:. df = pd.DataFrame({ 'A': [0.10, 0.03, -0.06, np.nan], 'B': [np.nan, 0.12, np.nan, np.nan], 'C': [-0.05, np.nan, 0.03, 0.07], 'D': [np.nan, np.nan, np.nan, 0.11] })Stack Overflow [pandas] · dan5771 votes, 3 repliesOpen ↗`pd.api.interchange.from_dataframe(pyarrow_table, allow_copy=False)` now raises RuntimeError### Pandas version checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the main branch of pandas (b40d70f2, 2026-10-13). ### Reproducible Example ### Issue Description `pd.api.interchange.from_dataframe(pa_table,...pandas-dev/pandas · IcantFind-a-usernameOpen ↗BUG: `DataFrame().shift(freq='D')` on an empty DataFrame now raises NotImplementedError### Pandas version checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the main branch of pandas (b40d70f2, 2026-10-13). ### Reproducible Example ### Issue Description `pd.DataFrame().shift(freq='D')` used to...pandas-dev/pandas · IcantFind-a-usernameOpen ↗ENH: DataFrame dtype keyword accept dictIn IO functions (im thinking mostly read_csv) the `dtype` keyword accepts a dict. We should allow the DataFrame dtype keyword to work the same way. I think this came up briefly at a recent dev call. IIRC @jorisvandenbossche suggested something like a `schema` keyword, but I'm...pandas-dev/pandas · jbrockmendelOpen ↗Converting Nubra historical_data() to a pandas DataFrame: TimeSeriesPoint objects, nanosecond timestamps and odd volume...column only ever increases. A 1-minute request going back a year also returns nothing. How should I parse this?.Stack Overflow [pandas] · Naira1 repliesOpen ↗How to compute a gradient column-wise in a pandas DataFrame using the index as an input?I'd like to compute the gradient of a DataFrame, for which I can gather that the best method is to use .apply() , e.g:. d = pd.DataFrame([[1,2,3],[4,5,6],[7,8,9]]) g = d.apply(np.gradient) print(g) Output:. 0 1 2 0 3.0 3.0 3.0 1 3.0 3.0 3.0 2 3.0 3.0 3.0 However, say I have an...Stack Overflow [pandas] · Petra3 votes, 2 repliesOpen ↗BUG: HDFStore.select with where="cat == None" returns empty DataFrame for Categorical columns instead of matching missing/NaN rows...IPython : 9.17.0 adbc-driver-postgresql: None adbc-driver-sqlite : None bs4 : 4.15.0 bottleneck : 1.6.0 fastparquet : 2026.5.0 fsspec : 2026.7.0 html5lib : 1.1 hypothesis : 6.165.10 gcsfs : 2026.8.0 jinja2 : 3.1.6 lxml.etree : 6.1.2 matplotlib : 3.11.1 numba : 0.67.0 numexpr :...pandas-dev/pandas · Johnhi196 repliesOpen ↗
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7 posts from 6 people in 2 places, about 1 a week over 53 days. Mostly on pandas-dev/pandas, Stack Overflow [pandas]. Tools named alongside: Docker, PostgreSQL, SQLite.
Frustration Frustration 1 of 3· Seen on GitHub issues, Stack Overflow
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Posts about pandas with no known issue, sharing the word "dataframe". First post Aug 28, 2026, latest Oct 19, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
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Trouble with pandas dataframe (2 posts)